Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D487/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00
  • C07D487/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, not provided for by groups C07D451/00 - C07D477/00 in which the condensed system contains two hetero rings
  • C07D487/04—Ortho-condensed systems
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
  • A61P7/02—Antithrombotic agents; Anticoagulants; Platelet aggregation inhibitors

Definitions

• This invention relates to novel trisubstituted pyrimido[5,4-d]pyrimidines and non-toxic acid addition salts thereof, to methods of preparing these compounds, to pharmaceutical compositions containing them as active ingredients, and to a method of using them as antithrombotics. More particularly, the present invention relates to a novel class of pyrimido[5,4-d]pyrimidines represented by the formula ##STR2## wherein
• R 1 is straight or branched alkyl of 2 to 8 carbon atoms, optionally substituted in the 2- to 8-position by up to 5 hydroxyls; alkyl of 2 to 4 carbon atoms mono-substituted in the 2-, 3- or 4-position by alkoxy of 1 to 3 carbon atoms, amino, (alkyl of 1 to 3 carbon atoms)amino, di(alkyl of 1 to 3 carbon atoms)amino or morpholino; methyl; or pyridyl-methyl;
• R 2 is hydrogen; alkyl of 1 to 3 carbon atoms; or alkyl of 2 to 3 carbon atoms mono-substituted in the 2- or 3-position by hydroxyl or alkoxy of 1 to 3 carbon atoms; or
• R 1 and R 2 together with each other and the nitrogen atom to which they are attached, are imidazolyl; morpholino; thiomorpholino; 1-oxido-thiomorpholino; piperidino; or mono-substituted piperidino, where the substituent is hydroxyl, alkoxy of 1 to 3 carbon atoms, hydroxy(alkyl of 1 to 3 carbon atoms), alkoxycarbonyl of 2 to 4 carbon atoms, amino, (alkanoyl of 1 to 3 carbon atoms)-amino, aminocarbonyl, (alkyl of 1 to 3 carbon atoms)-amino or di(alkyl of 1 to 3 carbon atoms)-amino;
• R 3 is morpholino, thiomorpholino, 1-oxidothiomorpholino or 1,1-dioxido-thiomorpholino, each of which is optionally mono- or di-substituted by one or two alkyls of 1 to 3 carbon atoms;
• R 4 is ##STR3##
• X is sulfur or oxygen
• R 5 is alkyl of 1 to 4 carbon atoms, optionally mono-substituted by phenyl or in the 2-, 3-or 4-position by hydroxyl, di(alkyl of 1 to 3 carbon atoms)-amino, alkoxy of 1 to 3 carbon atoms or alkoxycarbonyl of 2 to 4 carbon atoms; when X is sulfur, also phenyl; where each of the aforementioned phenyl moieties may optionally be methylenedioxy-substituted, mononitro-substituted, or mono- or di-substituted by alkyl of 1 to 3 carbon atoms, alkoxy of 1 to 3 carbon atoms, (alkyl of 1 to 3 carbon atoms)-thio, trifluoromethyl and/or halogen; alkyl of 5 to 8 carbon atoms; cycloalkyl of 5 to 7 carbon atoms; furfuryl; indanyl; or naphthylmethyl;
• R 6 is hydrogen; alkyl of 1 to 4 carbon atoms; or alkyl of 2 to 4 carbon atoms monosubstituted in the 2-, 3- or 4-position by hydroxyl or alkoxy of 1 to 3 carbon atoms; and
• R 7 is hydrogen; alkyl of 1 to 4 carbon atoms; phenyl-(alkyl of 1 to 4 carbon atoms); phenyl; where each of the aforementioned phenyl moieties may optionally be methylenedioxy-substituted or mono- or di-substituted by alkyl of 1 to 3 carbon atoms, alkoxy of 1 to 3 carbon atoms, (alkyl of 1 to 3 carbon atoms)-thio, trifluoromethyl and/or halogen; alkyl of 5 to 8 carbon atoms; cycloalkyl of 5 to 7 carbon atoms; alkyl of 2 to 8 carbon atoms mono-substituted in the 2- to 8-position by hydroxyl, alkoxy of 1 to 3 carbon atoms or hydroxy-(alkoxy of 1 to 3 carbon atoms); cyclohexylmethyl; hydroxycyclohexyl; furfuryl; or pyridyl-methyl; or
• R 6 and R 7 together with each other and the nitrogen atoms to which they are attached, are alkyleneimino of 4 to 7 carbon atoms, optionally monohydroxy-substituted or mono- or di-substituted by alkyl of 1 to 3 carbon atoms; tetrahydropyridino; tetrahydroquinolino; or tetrahydroisoquinolino;
• substituents R 1 through R 4 are the following:
• R 1 methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, 2-aminoethyl, 3-aminopropyl, 4-aminobutyl, 2-methylaminoethyl, 2-propylaminoethyl, 2-dimethylaminoethyl, 3-diethylaminopropyl, 4-methylethylaminobutyl, 2-morpholinoethyl, 2-hydroxyethyl, 3-hydroxypropyl, 4-hydroxybutyl, 5-hydroxypentyl, 6-hydroxyhexyl, 7-hydroxyheptyl, 8-hydroxyoctyl, 2-hydroxypropyl, 2,3-dihydroxypropyl, 3-hydroxy-2,2-dimethylpropyl, 2,3-dihydroxybutyl, 2,4-dihydroxybuty
• R 2 methyl, ethyl, propyl, isopropyl, 2-hydroxyethyl, 2-hydroxypropyl, 3-hydroxypropyl, 2-methoxyethyl, 2-isopropoxyethyl, 3-methoxypropyl or 2-methoxypropyl.
• R 1 and R 2 together with each other and the nitrogen atom to which they are attached--imidazolyl, morpholino, thiomorpholino, 1-oxido-thiomorpholino, piperidino, methyl-piperidino, ethyl-piperidino, dimethylpiperidino, hydroxy-piperidino, methoxy-piperidino, ethoxy-piperidino, hydroxymethyl-piperidino, 2-hydroxyethyl-piperidino, methoxycarbonyl-piperidino, ethoxycarbonyl-piperidino, dimethylamino-piperidino, acetylamino-piperidino, propionylamino-piperidino or aminocarbonyl-piperidino.
• R 3 morpholino, methyl-morpholino, propyl-morpholino, dimethyl-morpholino, ethylmethyl-morpholino, thiomorpholino, ethyl-thiomorpholino, 1-oxidothiomorpholino, 1,1-dioxido-thiomorpholino or methyl-1,1-dioxido-thiomorpholino.
• R 4 methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy, octyloxy, methylthio, ethylthio, propylthio, isopropylthio, butylthio, isobutylthio, pentylthio, isopentylthio, neopentylthio, hexylthio, heptylthio, octylthio, cyclopentoxy, cyclohexoxy, cycloheptoxy, cyclopentylthio, cyclohexylthio, cycloheptylthio, 2-hydroxy-ethoxy, 3-hydroxy-propoxy, 4-hydroxy-butoxy, 2-methoxy-ethoxy, 3-ethoxy-propoxy, 4-methoxy-butoxy, benzyloxy, methyl-benzyloxy, iso
• a preferred subgenus is constituted by those compounds of the formula I wherein
• R 1 is alkyl of 2 to 8 carbon atoms, optionally substituted in the 2- to 8-positions by up to 5 hydroxyls; 2-methoxy-ethyl; 2-amino-ethyl; 2-diethylamino-ethyl; or 2-morpholino-ethyl; methyl; or pyridylmethyl;
• R 2 is hydrogen; or alkyl of 1 to 3 carbon atoms optionally mono-substituted in the 2- or 3-position by hydroxyl or methoxy; or
• R 1 and R 2 together with each other and the nitrogen atoms to which they are attached, are piperidino, optionally mono-substituted by hydroxyl, methoxy, hydroxymethyl, dimethylamino, acetamino, aminocarbonyl or ethoxycarbonyl; morpholino; 1-oxido-thiomorpholino; or imidazolyl;
• R 3 is morpholino, dimethyl-morpholino, thiomorpholino, 1-oxido-thiomorpholino or 1,1-dioxidothiomorpholino;
• R 4 is alkoxy of 1 to 8 carbon atoms; phenyl-(alkoxy of 1 to 4 carbon atoms); cyclohexyloxy; alkylthio of 1 to 8 carbon atoms; phenyl-(alkylthio of 1 to 4 carbon atoms); phenylthio; where the phenyl moieties of afore-mentioned benzyloxy, benzylthio or phenylthio groups may be methylenedioxy-substituted, mononitro-substituted or mono- or di-substituted by methyl, hydroxyl, methoxy, methylthio, trifluoromethyl, fluorine, chlorine or bromine; cyclohexylthio; 2-hydroxyethyl-thio; 2-diethylamino-ethyl-thio; ethoxycarbonyl-methylthio; ⁇ -methyl-methylthiobenzyl-thio; naphthy
• R 6 is hydrogen; alkyl of 1 to 4 carbon atoms; or alkyl of 2 to 3 carbon atoms substituted in the 2- or 3-position by methoxy; and
• R 7 is hydrogen; alkyl of 1 to 8 carbon atoms, hydroxy-(alkyl of 2 to 8 carbon atoms); alkyl of 2 to 3 carbon atoms mono-substituted in the 2- or 3- position by methoxy, ethoxy or hydroxy-ethoxy; phenyl-(alkyl of 2 carbon atoms), optionally mono- or di-methoxy-substituted on the phenyl moiety; cyclohexyl; hydroxy-cyclohexyl; cyclohexyl-methyl; 3-phenyl-propyl; 4-phenyl-butyl; furfuryl; pyridylmethyl; phenyl, optionally methylenedioxy-substituted or mono- or di-substituted by methyl, hydroxyl, methoxy, ethoxy, methylthio, trifluoromethyl, fluorine and/or chlorine; or benzyl, optionally methylenedioxy-sub
• R 6 and R 7 together with each other and the nitrogen atom to which they are attached, are pyrrolidino, piperidino, methyl-piperidino, ethyl-piperidino, dimethyl-piperidino, hydroxy-piperidino, hexamethyleneimino, heptamethyleneimino, tetrahydropyridino, tetrahydroquinolino or tetrahydroisoquinolino;
• R 1 is alkyl of 2 to 5 carbon atoms, optionally mono- or di-hydroxy-substituted or mono-methoxy-substituted in the 2- to 5-position;
• R 2 is hydrogen or 2-hydroxy-ethyl
• R 3 is 1-oxido-thiomorpholino
• R 4 is alkoxy of 1 to 6 carbon atoms, phenyl(alkoxy of 1 to 3 carbon atoms), alkylthio of 1 to 6 carbon atoms, phenyl-(alkylthio of 1 to 3 carbon atoms), cyclohexylthio or ##STR5##
• R 6 is hydrogen or alkyl of 1 to 4 carbon atoms
• R 7 is alkyl of 2 to 5 carbon atoms; mono-hydroxy-substituted alkyl of 2 to 5 carbon atoms; or mono-phenyl-substituted alkyl of 1 to 4 carbon atoms; where the phenyl moiety of aforementioned benzylamino, benzyloxy or benzylthio groups may be mono- or di-substituted by fluorine, chlorine and/or methoxy; or
• R 6 and R 7 together with each other and the nitrogen atoms to which they are attached, are pyrrolidino, piperidino or hexamethyleneimino;
• R 3 has the same meanings as in formula I;
• Y is a nucleophilic leaving group or R 4 , where R 4 has the same meanings as in formula I;
• Z is a nucleophilic leaving group
• A is ##STR7## where R 1 , R 2 , R 6 and R 7 have the same meanings as in formula I.
• nucleophilic leaving groups are halogen such as chlorine or bromine, substituted hydroxyl such as phenoxy, or sulfonyl such as methylsulfonyl.
• the reaction is advantageously carried out in an inert solvent such as acetone, methyl ethyl ketone, tetrahydrofuran, dioxane, chlorobenzene, dimethylformamide or dimethylsulfoxide, optionally in the presence of an inorganic base such as sodium carbonate or potassium hydroxide, or of a tertiary organic base such as triethylamine or pyridine, where the latter can at the same time also serve as solvents, and optionally in the presence of a reaction accelerator such as a copper salt, a corresponding amine hydrohalide or alkali metal halide, at temperatures between 0° and 150° C., but preferably at temperatures between 20° and 120° C.
• a reaction accelerator such as a copper salt, a corresponding amine hydrohalide or alkali metal halide, at temperatures between 0° and 150° C., but preferably at temperatures between 20° and 120° C.
• the reaction can also be carried out without a solvent or
• R 1 , R 2 and R 5 have the same meanings as in formula I, and
• W is lower alkyl such as methyl, ethyl or propyl, or aralkyl such as benzyl, methylbenzyl, chlorobenzyl, nitrobenzyl or naphthylmethyl,
• R 3 has the same meanings as in formula I.
• the reaction is advantageously carried out in a solvent such as benzene, tetrahydrofuran, dioxane, dimethylformamide, ethanol or isopropanol, or in an excess of the amine of the formula V, and at elevated temperatures between 60° and 150° C., but preferably at temperatures between 70° and 120° C.
• a solvent such as benzene, tetrahydrofuran, dioxane, dimethylformamide, ethanol or isopropanol
• the reaction can also be carried out without a solvent.
• the subsequent oxidation is preferably carried out in a solvent such as water, water/pyridine, glacial acetic acid or methanol, and depending upon the oxidizing agent which is used, at temperatures between -80° and +100° C.
• a solvent such as water, water/pyridine, glacial acetic acid or methanol, and depending upon the oxidizing agent which is used, at temperatures between -80° and +100° C.
• the subsequent oxidation is advantageously carried out with one equivalent of the oxidizing agent which is used, for example with hydrogen peroxide in glacial acetic acid at 0° to 20° C., with a peracid such as peracetic acid, m-chloroperbenzoic acid or peroxytrifluoroacetic acid at 0° to 50° C., with potassium permanganate in dilute hydrochloric acid at 0° C., with sodium metaperiodate in aqueous methanol or ethanol at 15° to 25° C., with tert.
• the oxidizing agent which is used, for example with hydrogen peroxide in glacial acetic acid at 0° to 20° C., with a peracid such as peracetic acid, m-chloroperbenzoic acid or peroxytrifluoroacetic acid at 0° to 50° C., with potassium permanganate in dilute hydrochloric acid at 0° C., with sodium metaperiodate in aqueous
• butyl hypochlorite in methanol at -80° to -30° C. with iodobenzene dichloride in aqueous pyridine at 0° to 50° C., with nitric acid in glacial acetic acid or acetone at 0° to 20° C.
• the subsequent oxidation is advantageously carried out with two equivalents of the particular oxidizing agent, starting from a thiomorpholino compound of the formula I, or with one equivalent, starting from a thiomorpholino-1-oxide compound of the formula I, in a way similar to that described above.
• the reaction is carried out at a reaction temperature 10° to 50° C. higher.
• the compounds of the formula I are basic and therefore form addition salts with inorganic or organic acids.
• non-toxic, pharmacologically acceptable acid addition salts are those formed with hydrochloric acid, hydrobromic acid, sulfuric acid phosphoric acid, methanesulfonic acid, p-toluenesulfonic acid, acetic acid, lactic acid, citric acid, tartaric acid, succinic acid, maleic acid, fumaric acid, salicylic acid or the like.
• the starting compounds of the formula II through V are either described in the literature or are obtainable by methods described in the literature.
• the starting compounds of the formulas II and IV are obtained by stepwise replacement of the chlorine atoms of 2,4,8-trichloropyrimido[5,4-d]pyrimidine (see German Pat. No. 1,116,676).
• reaction can also be carried out in completely analogous manner using an aqueous potassium carbonate solution instead of triethylamine.
• reaction can also be carried out in completely analogous manner, using 2N sodium hydroxide instead of a sodium methylate solution.
• This compound was prepared analogous to Example 1 from 2-chloro-8-methylthio-4-(1-oxido-thiomorpholino)pyrimido[5,4d]pyrimidine (melting point: 260°-262° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-8-methylthio-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and diethanolamine.
• This compound was prepared analogous to Example 1 from 2-chloro-4-(1-oxido-thiomorpholino)-8-propylthiopyrimido[5,4-d]pyrimidine (melting point: 209°-210° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-octylthio-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 106°-108° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-cyclohexylthio-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 225°-227° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-morpholino-pyrimido[5,4-d]pyrimidine (melting point: 159°-161° C.) and 2-hydroxyethylamine by heating in dimethylsulfoxide at 50° C.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-thiomorpholino-pyrimido[5,4-d]pyrimidine (melting point: 175°-177° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1,1-dioxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 230°-233° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 188°-190° C.) and diethanolamine by refluxing for three hours.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 1-amino-2-propanol.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 1-amino-2,3-propandiol.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and N-methyl-D-glucamine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and methylamine in dioxane at about 100° C. under pressure.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and ethylenediamine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine and 2-diethylaminoethyl-amine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 3-picolylamine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 4-hydroxy-piperidine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 4-methoxy-piperidine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 4-dimethylamino-piperidine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 4-acetylamino-piperidine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrinido[5,4-d]pyrimidine and piperidino-4-carboxylic acid amide.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorhpolino)pyrimido[5,4-d]pyrimidine and ethyl piperidino-4-carboxylate.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and ethyl piperidino-3-carboxylate.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and morpholine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-morpholino-pyrimido[5,4-d]pyrimidine melting point: 159°-161° C.) and thiomorpholine-1-oxide.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-thiomorpholino-pyrimido[5,4-d]pyrimidine (melting point: 175°-177° C.) and thiomorpholine1-oxide.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 188°-190° C.) and thiomorpholine-1-oxide by refluxing for three hours in dioxane.
• This compound was prepared analogous to Example 1 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethylthiopyrimido[5,4-d]pyrimidine (melting point: 248°-250° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(3-phenylpropylthio)-pyrimido[5,4-d]pyrimidine (melting point: 172°-174° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 8-ethoxycarbonylmethylthio-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 174°-175° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(2-diethylaminoethyl-thio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 146°-148° C.) and 2-hydroxypropyl-amine. Resin.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(1-naphthylmethyl thio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 212°-215° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenylthiopyrimido[5,4-d]pyrimidine (melting point: 253°-255° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(4-hydroxyphenyl-thio)-4-(1-oxidothiomorpholino)-pyrimido[ 5,4 -d ](melting point: >280° C.) and diethanolamine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(4-fluoropehnyl-thio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 243°-245° C.) and diethanolamine.
• This compound was prepared analogous to Example 2 from 8-amino-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 270°-272° C.; decomposition) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-methylamino-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 278°-280° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-propylaminopyrimido[5,4-d]pyrimidine (melting point: 174°-176° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-isopropylamino-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 213°-215° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-butylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 179°-181° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-isopentylamino-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 176°-178° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-octylamino-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 145°-147° C.) and 2-hydroxyethylamine.
• This compound was prepared analogous to Example 2 from 8-(N-ethyl-butylamino)-2chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 157°-158° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-dibutylamino-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 187°-189° C.) and 2-hydroxyethyl-amine).
• This compound was prepared analogous to Example 2 from 2-chloro-8-cyclohexylmethyl-amino-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 217°-218° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-morpholino-pyrimido[5,4-d]pyrimidine (melting point: 139°-141° C.) and 2-hydroxyethylamine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-thiomorpholino-pyrimido[5,4-d]pyrimidine (melting point: 129°-130° C.) and 2-hydroxyethylamine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1,1-dioxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 213°-215° C.) and 2-hydroxyethyl-amine.
• This compound was also obtained from 8-benzylamino-2-(2-hydroxyethyl-amino)-4-thiomorpholino-pyrimido[5,4-d]pyrimidine by oxidation with potassium permanganate in dilute hydrochloric acid.
• This compound was prepared analogous to Example 3 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and diethanolamine.
• This compound was prepared analogous to Example 3 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and N-(2-hydroxy-ethyl)-N-(2-methoxy-ethyl)-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethylaminopyrimido[5,4-d]pyrimidine (melting point: 202°-204° C.) and diethanolamine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethylaminopyrimido[5,4-d]pyrimidine and N-(2-hydroxyethyl)-2-methoxyethylamine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(3-phenylpropylamino)-pyrimido[5,4-d]pyrimidine (melting point: 152°-154° C.) and diethanolamine.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethylaminopyrimido[5,4-d]pyrimidine (melting point: 202°-204° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(3-phenylpropylamino)-pyrimido[5,4-d]pyrimidine (melting point: 152°-154° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(4-phenylbutylamino)-pyrimido[5,4-d]pyrimidine (melting point: 156°-158° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(L-1-phenylethyl-amino)-pyrimido[5,4-d]pyrimidine (melting point: 167°-169° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and 5-amino-1-pentanol.
• This compound was prepared analogous to Example 3 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and 6-amino2-methyl-2-heptanol. Resin.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and 3-hydroxypiperidine.
• This compound was prepared analogous to Example 3 from 8-(N-benzyl-methylamino)-2-chloro-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 158°-160° C.) and diethanolamine.
• This compound was prepared analogous to Example 2 from 8-(N-benzylmethylamino)-2-chloro-4-thiomorpholinopyrimido[5,4-d]pyrimidine (melting point: 95°-97° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-(N-benzyl-methylamino)-2-chloro-4-morpholinopyrimido[5,4-d]pyrimidine (melting point: 121°-123° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-(N-benzyl-propylamino)-2-chloro-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 183°-184° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-(N-benzyl-butylamino)-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 153°-155° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-[N-benzyl-N-(2-hydroxyethyl)-amino]-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 153°-155° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2,8-dichloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 195°-198° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(5-hydroxypentyl-amino)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 202°-204° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-(3-ethoxypropyl-amino)-2-chloro-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 153°-154° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(3-picolyl-amino)pyrimido[5,4-d]pyrimidine (melting point: 227°-229° C.) and 1-amino-2-propanol.
• This compound was prepared analogous to Example 2 from 2-chloro-8-[N-methyl-N-(3-picolyl)-amino]-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 154°-156° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 8-(4-ethoxy-anilino)-2-chloro-4-(1-oxido-thiomorpholino) pyrimido[5,4-d]pyrimidine (melting point: 237°-240° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(4-methylbenzyl-amino)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 185°-187° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(3-methoxybenzyl-amino)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 222°-224° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(4-methoxybenzyl-amino)-4-(1-oxido-thiomorpholino) pyrimido[5,4-d]pyrimidine (melting point: 220°-222° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(3,4-dimethoxybenzyl-amino)-4-(oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 218°-220° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(4-fluorobenzyl-amino)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 210°-212° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(4-chlorobenzyl-amino)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 216°-218° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(2,4-dichlorobenzyl-amino)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 196°-198° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-(3,4-dimethoxyphenethyl-amino)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 214°-216° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 2-chloro-8-[N-(3,4-dimethoxy-phenethyl)-methylamino]-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 178°-179° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-piperidinopyrimido[5,4-d]pyrimidine (melting point: 203°-204° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-piperidinopyrimido[5,4-d]pyrimidine and 3-hydroxypropyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-piperidinopyrimido[5,4-d]pyrimidine and 2-hydroxypropyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-piperidinopyrimido[5,4-d]pyrimidine and 2,2-dimethyl-3-hydroxypropylamine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-pyrrolidinopyrimido[5,4-d]pyrimidine (melting point: 243°-244° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-8-hexamethylene-imino-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 206°-207° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-8-heptamethyleneimino-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 214°-215° C.) and diethanolamine.
• This compound was prepared analogous to Example 3 from 2-chloro-8-(4-methyl-piperidino)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 195°-196° C.) and diethanolamine.
• This compound was prepared analogous to Example 3 from 2-chloro-8-(3,5-dimethyl-piperidino)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 186°-187° C.) and diethanolamine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(1,2,5,6-tetrahydro-pyridino)-pyrimido[5,4-d]pyrimidine (melting point: 189°-190° C.) and diethanolamine.
• This compound was prepared analogous to Example 3 from 8-[N,N-bis-(2-methoxy-ethyl)-amino]-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 136°-138° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-methoxy-4-morpholino-pyrimido[5,4-d]pyrimidine (melting point: 160°-162° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-4-(1-oxido-thiomorpholino)-8-propoxy-pyrimido[5,4-d]pyrimidine (melting point: 205°-207° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-isopentyloxy-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 143°-145° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-octyloxy-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 94°-96° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-cyclohexyloxy-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 185°-187° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 227°-229° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 3-hydroxypropyl-amine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and N-methyl-glucamine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and diisopropanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethoxypyrimido[5,4-d]pyrimidine (melting point: 242°-245° C.) and 3-hydroxypropyl-amine in dimethylsulfoxide.
• This compound was prepared analogous to Example 4 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethoxypyrimido[5,4-d]pyrimidine and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-4-(1-oxido-thiomorpholino)-8-phenethoxypyrimido[5,4-d]pyrimidine and 3-hydroxy-piperidine.
• This compound was prepared analogous to Example 4 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(3-phenyl-propoxy)pyrimido[5,4-d]pyrimidine (melting point: 152°-154° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(4-phenylbutoxy)-pyrimido[ 5,4-d]pyrimidine (melting point: 124°-126° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-morpholino-pyrimido[5,4-d]pyrimidine (melting point: 146°-148° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-thiomorpholino-pyrimido[5,4-d]pyrimidine (melting point: 183°-185° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 8-benzyloxy-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 227°-229° C.) and dimethylamine under pressure.
• This compound was prepared analogous to Example 4 from 2-chloro-8-furfuryloxy-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 183°-185° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(4-methyl-benzyloxy)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 178°-180° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(4-chloro-benzyloxy)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 214°-216° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(4-methoxy-benzyloxy)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 184°-186° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(3,4-methylenedioxy-benzyloxy)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 216°-218° C.) and diethanolamine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(4-fluoro-benzylthio)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 192°-194° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(2-chloro-benzylthio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 203°-206° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(4-chloro-benzylthio)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 232°-234° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(3,4-dichloro-benzylthio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 210°-212° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(trifluoromethylbenzyl-thio)-pyrimido[5,4-d]pyrimidine (melting point: 211°-213° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(3,4-dimethoxybenzyl-thio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 186°-188° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-( ⁇ -methyl-4-methylthiobenzyl-thio)-pyrimido [5,4-d]pyrimidine (melting point: 146°-149° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(3-chloro-benzyl-thio)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 179°-182° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 2-chloro-8-(3-nitrobenzyl-thio)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 233°-235° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-1]pyrimidine (melting point: 188°-190° C.) and N-ethyl-N-(2-hydroxy-ethyl)-amine.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 188°-190° C.) and 2-amino-2-methyl-propanol in dioxane by refluxing for 24 hours.
• This compound was prepared analogous to Example 1 from 8-benzylthio-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and trans-4-hydroxy-cyclohexylamine.
• This compound was prepared analogous to Example 2 from 8-(2-ethylhexyl-amino)-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 118°-120° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 3 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(1,2,3,4-tetrahydro-quinolino)-pyrimido[5,4-d]pyrimidine (melting point: 198°-199° C.) and 2-hydroxyethyl-amine at about 100° C.
• This compound was prepared analogous to Example 2 from 2-chloro-4-(1-oxido-thiomorpholino)-8-(1,2,3,4-tetrahydro-isoquinolino)-pyrimido[5,4-d]pyrimidine (melting point: 164°-166° C.) and 2-hydroxyethyl-amine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and N-(2-hydroxy-ethyl)-methylamine in dioxane under reflux.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and N-ethyl-N-(2-hydroxyethyl)-amine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and N-(2-hydroxy-ethyl)propylamine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine (melting point: 232°-233° C.) and 2-(2-hydroxy-ethoxy)-ethylamine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and 4-hydroxy-piperidine.
• This compound was prepared analogous to Example 3 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and trans-4-hydroxycyclohexylamine.
• This compound was prepared analogous to Example 2 from 8-benzylamino-2-chloro-4-(1-oxido-thiomorpholino)pyrimido[5,4-d]pyrimidine and cyclohexylamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(2-fluoro-benzyloxy)-4-(1-oxidothiomorpholino)-pyrimido[ 5,4-d]pyrimidine (melting point: 212°-214° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(3-fluoro-benzyloxy)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 206°-208° C.) and diethanolamine.
• This compound was prepared analogous to Example 4 from 2-chloro-8-(3,4-dichloro-benzyloxy)-4-(1-oxidothiomorpholino)-pyrimido[5,4-d]pyrimidine (melting point: 211°-213° C.) and diethanolamine.
• the compounds of the present invention that is, those embraced by formula I above and their non-toxic, pharmacologically acceptable acid addition salts, have useful pharmacodynamic properties. More particularly, they exhibit primarily antithrombotic activity in warmblooded animals. In addition, they exhibit hypotensive, cardiotonic and PDE-inhibiting activities and an inhibiting effect on the aggregation of cancer cells suspended in the blood stream.
• A 2-(2-Hydroxyethyl-amino)-4-(1-oxido-thiomorpholino)-8-propylthio-pyrimido[5,4-d[pyrimidine,
• F 2-(2-Hydroxyethyl-amino)-8-( ⁇ -methyl-4-methylthiobenzyl-thio)-4-(1-oxido-thiomorpholino)-pyrimido[5,4-d]pyrimidine,
• P 2-Diethanolamino-4-(1-oxido-thiomorpholino)-8-(3-phenylpropoxy)-pyrimido[5,4-d]pyrimidine.
• Thrombocyte aggregation was measured according to the method of Born and Cross [J. Physiol. 170, 397 (1964)]in platelet-rich plasma of healthy test persons. To inhibit coagulation, the blood was mixed with sodium citrate in a volume ration of 1:10.
• the rate of decrease in optical density of the platelet suspension is measured photometrically and recorded.
• the rate of aggregation was determined from the angle of inclination of the density curve. The point on the curve at which there was the greatest translucence served for calculating the optical density.
• the quantity of collagen was chosen as small as possible, but sufficient so that an irreversible reaction was obtained.
• Commercial collagen of Hormonchemie, Kunststoff, was used. Before the collagen was added, the plasma was incubated for 10 minutes with the test substance at 37° C.
• the acute toxicity of the test compounds was determined on groups of 6 to 10 mice after oral administration of a dose of 250 mg/kg (observation time: 14 days).
• the substances were suspended in 2% methyl cellulose, some water was subsequently added and the test substance was administered to the conscious animals by esophageal tube.
• the compounds of the formula I and their non-toxic, pharmacologically acceptable acid addition salts are useful for the prophylaxis of thrombo-embolic diseases such as coronary infarction, cerebral infarction, so-called transient ischaemic attacks or amaurosis fugax, and for the prophylaxis of arterio-sclerosis.
• the compounds of the present invention are administered to warm-blooded animals perorally, parenterally or rectally as active ingredients in customary dosage unit compositions, that is, compositions in dosage unit form consisting essentially of an inert pharmaceutical carrier and one effectice dosage unit of the active ingredient, such as tablets, coated pills, capsules, wafers, powders, solutions, suspensions, emulsions, syrups, suppositories and the like.
• One effective dosage unit of the compounds according to the present invention is from 0.0014 to 0.29 mgm/kg body weight, preferably 0.007 to 0.07 mgm/kg body weight, 2 to 4 times daily.
• the tablet core is compounded from the following ingredients:
• the active ingredient, the lactose and the corn starch are intimately admixed with each other, the mixture is uniformly moistened with an aqueous solution of the polyvinyl pyrrolidone, and the moist mass is granulated by passing it through a 1 mm-mesh screen.
• the granulate is dried, again passed through the screen, admixed with the magnesium stearate, and the composition is compressed into 50 mgm tablet cores which are subsequently coated with a thin sugar shell.
• Each coated tablet is an oral dosage unit composition containing 1 mgm of the active ingredient.
• the tablet composition is compounded from the following ingredients:
• Example 209 The ingredients are compounded as described in Example 209, and the composition is compressed into 50 mgm-tablets, each of which is an oral dosage unit composition containing 2 mgm of the active ingredient.
• the suppository composition is compounded from the following ingredients:
• the suppository base is melted and cooled to 38° C. and the pulverized active ingredient is homogeneously distributed therein with the aid of an immersion homogenizer. 1700 mgm-portions of the composition are poured at 35° C. into cooled suppository molds and allowed to harden therein.
• Each suppository is a rectal dosage unit composition containing 5 mgm of the active ingredient.
• the suspension is compounded from the following ingredients:
• the distilled water is heated to 70° C.
• the methyl and propyl p-hydroxy-benzoates as well as the glycerol and the carboxymethyl cellulose are dissolved therein while stirring.
• the mixture is cooled to room temperature, and the active ingredient is added while stirring and dispersed homogeneously.
• the suspension is evacuated while stirring to remove air. 5 ml of the suspension are an oral dosage unit composition containing 2 mgm of the active ingredient.
• the solution is compounded from the following ingredients:
• the active ingredient base is suspended in the water for injection purposes and is completely dissolved by heating and dropwise addition of the hydrochloric acid. After filtering through a diaphragm filter, the solution is filled into 2 cc-ampules which are then sterilized in an autoclave and sealed. The contents of each ampule are an injectable dosage unit composition containing 1 mgm of the active ingredient.
• any one of the other compounds embraced by formula I or a non-toxic, pharmacologically acceptable acid addition salt thereof may be substituted for the particular active ingredient in Examples 209 through 213.
• the amount of active ingredient in these illustrative examples may be varied to achieve the dosage unit range set forth above, and the amounts and nature of the inert pharmaceutical carrier ingredients may be varied to meet particular requirements.

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